*pics* Tiffany and Yoona release their Black Soshi concept photos!

Girls’ Generation continue to tease their upcoming new “dark” concept with two more member photos.

This time it’s Tiffany and Yoona’s turn to go to the dark side. These last two photos complete the teaser set started with Yuri on the 10th. This was followed with Hyoyeon, Sooyoung, Taeyeon, Seohyun, Jessica and Sunny. The girls all look great with a more sexy and dangerous style.